Usage:
Concepcion Formation (PR*)
Geologic age:
Late Cretaceous (Campanian to Maastrichtian)*
Type section, locality, area and/or origin of name:
Type locality: exposures along Rio Anasco near Route 119 bridge (Puerto Rico Meter Grid System 94,620 E.; 49,270 N.), along road that follows boundary between Barrios Purisima Concepcion and Buena Vista (97,380 E.; 47,420 N. to 98,265 E.; 48,400 N.), Municipio de las Marias, and in Quebrada Velez (98,170 E.; 46,200 N. to 98,460 E.; 47,570 N.), San Sebastian quadrangle, northwestern Puerto Rico (McIntyre and others, 1970).
[The Puerto Rico Meter Grid System on west and east margins of 1958 ed. of San Sebastian topographic quadrangle are in error; see adjacent Central la Plata and Bayaney quadrangles.]
AAPG geologic province:
Caribbean region*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).